KR20190139884A - Base station apparatus, terminal apparatus, communication method, and integrated circuit - Google Patents

Abstract

A terminal apparatus for communicating with a base station apparatus, the apparatus comprising: a multiple unit for mapping a PTRS signal generated by a pseudo random code to a resource element, and a transmitting unit for transmitting a PUSCH, wherein the multiple unit is configured to transmit the PTRS signal at least at a frequency position. Is mapped to a subcarrier based on the offset, the C-RNTI, the number of scheduled resource blocks, and the frequency density of the PTRS, and the transmitter transmits the PUSCH to which the PTRS is mapped.

Description

Base station apparatus, terminal apparatus, communication method, and integrated circuit

The present invention relates to a base station apparatus, a terminal apparatus, a communication method, and an integrated circuit.

This application claims priority with respect to patent application 2017-088200 for which it applied to Japan on April 27, 2017, and uses the content here.

Currently, as a radio access method and a wireless network technology suitable for a fifth generation cellular system, in the Third Generation Partnership Project (3GPP), Long Term Evolution (LTE) -Advanced Pro and NR (New Radio) technology review and standard development are performed (Non-Patent Document 1).

In the fifth generation of cellular systems, machine types such as Enhanced Mobile BroadBand (eMBB) for realizing high speed and high capacity transmission, Ultra-Reliable and Low Latency Communication (URLLC) for realizing low latency and high reliability communication, and Internet of Things (IoT) Three of the Massive Machine Type Communication (mMTC) to which many devices are connected are required as an assumed scenario of service.

In NR, in order to communicate at a high frequency, a reference signal for tracking phase noise generated by the oscillator is examined (Non-Patent Document 2).

RP-161214, NTT DOCOMO, "Revision of SI: Study on New Radio Access Technology", June 2016 R1-1706676, Ericsson, Panasonic, Huawei, HiSilicon, NTT Docomo, "Merged WF on PT-RS structure", April 2017

An object of the present invention is to provide a terminal apparatus, a base station apparatus, a communication method, and an integrated circuit in a base station apparatus and a terminal apparatus in the above-described wireless communication system.

(1) In order to achieve the said objective, the aspect of this invention took the following means. That is, the terminal device according to one aspect of the present invention is a terminal device that communicates with a base station device, and includes a multiple part for mapping a PTRS (Phase Tracking Reference Signal) signal generated by a pseudo random code to a resource element, and a PUSCH ( And a transmitter for transmitting a Physical Uplink Shared CHannel, wherein the multiplexer includes at least an offset of a frequency position, a cell-radio network temporary identifier (C-RNTI), a number of scheduled resource blocks, and a frequency of PTRS. Mapping to a subcarrier based on density, the transmitter transmits a PUSCH to which PTRS is mapped.

(2) In the terminal device according to one aspect of the present invention, the frequency density of the PTRS includes the case of filtering one subcarrier.

(3) The terminal apparatus according to one aspect of the present invention is further provided with a receiving unit for receiving an RRC (Radio Resource Control) signal, wherein the offset information of the frequency position is notified by the RRC.

(4) Furthermore, the terminal apparatus in one aspect of this invention WHEREIN: When it comprises a receiver which receives an RRC signal, and encodes or scrambles several PTRS in the same said resource element, it encodes or scrambles The index number for identifying the sequence has been notified by the RRC.

(5) Furthermore, the terminal apparatus in one aspect of this invention WHEREIN: The information which shows that it is equipped with the receiving part which receives an RRC signal, and the transmission power in the some resource element of the said PTRS is zero, Notified by the RRC.

(6) In addition, the base station apparatus according to one aspect of the present invention is a base station apparatus which communicates with a terminal apparatus, which receives a PUSCH to which a PTRS signal is mapped, and a multiple separation unit that separates the PTRS signal from the PUSCH. And the multiple separation unit separates the PTRS signal mapped to the subcarrier based at least on the offset of the frequency position, the C-RNTI, the number of scheduled resource blocks, and the frequency density of the PTRS.

(7) In addition, the communication method in one aspect of the present invention is a communication method of a terminal device which communicates with a base station apparatus, wherein at least a PTRS signal generated by a pseudo random code is offset of a frequency position and a C-RNTI. On the basis of the number of scheduled resource blocks and the frequency density of the PTRS, and the PUSCH to which the PTRS signal is mapped is transmitted.

(8) Moreover, the communication method in one aspect of the present invention is a communication method of a base station apparatus which communicates with a terminal apparatus, receives a PUSCH to which a PTRS signal is mapped, and at least an offset of a frequency position from the PUSCH; The PTRS signal mapped to the subcarrier is separated based on the C-RNTI, the number of scheduled resource blocks, and the frequency density of the PTRS.

(9) In addition, the integrated circuit in one aspect of the present invention is an integrated circuit mounted in a terminal device that communicates with a base station apparatus, and includes multiple means for mapping a PTRS signal generated by a pseudo random code to a resource element; Transmitting means for transmitting a PUSCH, wherein the multiple means maps the PTRS signal to a subcarrier based at least on an offset of a frequency position, a C-RNTI, the number of scheduled resource blocks, and a frequency density of the PTRS, The transmitting means transmits the PUSCH to which the PTRS is mapped.

(10) Moreover, the integrated circuit in one aspect of the present invention is an integrated circuit mounted in a base station apparatus that communicates with a terminal apparatus, and includes receiving means for receiving a PUSCH to which a PTRS signal is mapped, and the PTRS signal from the PUSCH. And multiple separation means for separating the PTRS signals mapped to subcarriers based on at least an offset of a frequency position, a C-RNTI, the number of scheduled resource blocks, and a frequency density of PTRS. Separate.

According to one aspect of the present invention, the base station apparatus and the terminal apparatus can communicate efficiently.

1 is a diagram illustrating the concept of a wireless communication system according to the present embodiment.
2 is a diagram illustrating an example of a schematic configuration of a downlink slot in the present embodiment.
3 is a diagram illustrating a relationship in the time domain of subframes, slots, and mini-slots.
4 is a diagram illustrating an example of a slot or subframe.
5 is a diagram illustrating an example of beamforming.
6 is a schematic block diagram showing the configuration of the terminal device 1 according to the present embodiment.
7 is a schematic block diagram showing the configuration of the base station apparatus 3 according to the present embodiment.
8 is a diagram illustrating a first configuration example of PTRS according to the first method in the present embodiment.
9 is a diagram illustrating a second configuration example of the PTRS according to the first method in the present embodiment.
10 is a diagram illustrating a third structural example of the PTRS according to the first method in the present embodiment.
11 is a diagram showing a fourth structural example of the PTRS according to the first method in the present embodiment.
12 is a diagram illustrating a first configuration example of PTRS according to the second method in the present embodiment.
FIG. 13 is a diagram showing a second configuration example of PTRS according to the second method in the present embodiment.
14 is a diagram illustrating an example of the configuration of a PTRS according to the third method of the present embodiment.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described.

1 is a conceptual diagram of a wireless communication system in the present embodiment. In FIG. 1, the radio communication system includes the terminal devices 1A to 1C and the base station device 3. Hereinafter, the terminal devices 1A to 1C are also called the terminal device 1.

The terminal apparatus 1 is also called a user terminal, a mobile station apparatus, a communication terminal, a mobile device, a terminal, a user equipment (UE), and a mobile station (MS). The base station apparatus 3 includes a radio base station apparatus, a base station, a wireless base station, a fixed station, an NB (Node B), an evolved Node B (NB), a base transceiver station (BTS), a base station (BS), and an NR NB (NR Node B). NNB, Transmission and Reception Point (TRP), and gNB.

1, in wireless communication between the terminal apparatus 1 and the base station apparatus 3, orthogonal frequency division multiplexing (OFDM) including a cyclic prefix (CP) and a single carrier frequency. Single-Carrier Frequency Division Multiplexing (SC-FDM), Discrete Fourier Transform Spread OFDM (DDM-S-OFDM), Multi-Carrier Code Division Multiplexing (MC-CDM) May be used.

1, in the wireless communication between the terminal apparatus 1 and the base station apparatus 3, a universal filter multicarrier (UFMC), a filter OFDM (F-OFDM: Filtered OFDM), Windowed OFDM multiplied by a window function and Filter-Bank Multi-Carrier (FBMC) may be used.

In this embodiment, OFDM is described as a transmission method, and an OFDM symbol is used. However, the case of using the other transmission method described above is also included in one embodiment of the present invention.

In addition, in FIG. 1, in the wireless communication between the terminal apparatus 1 and the base station apparatus 3, the above-mentioned transmission method which does not use CP or performs zero padding instead of CP may be used. In addition, CP or zero padding may be added to both front and rear sides.

1, in wireless communication between the terminal apparatus 1 and the base station apparatus 3, orthogonal frequency division multiplexing (OFDM) including a cyclic prefix (CP) and a single carrier frequency. Single-Carrier Frequency Division Multiplexing (SC-FDM), Discrete Fourier Transform Spread OFDM (DDM-S-OFDM), Multi-Carrier Code Division Multiplexing (MC-CDM) May be used.

In FIG. 1, the following physical channels are used in the wireless communication between the terminal device 1 and the base station device 3.

PBCH (Physical Broadcast CHannel)

PCCH (Physical Control CHannel)

PSCH (Physical Shared CHannel)

The PBCH is used by the terminal device 1 to report a critical information block (MIB: Master Information Block, EIB: Essential Information Block, BCH: Broadcast Channel) containing important system information.

In the case of uplink radio communication (radio communication of the base station apparatus 3 from the terminal apparatus 1), the PCCH is used for transmitting uplink control information (UCI). Here, the uplink control information may include channel state information (CSI) used to indicate the state of the downlink channel. In addition, the uplink control information may include a scheduling request (SR) used for requesting a UL-SCH resource. The uplink control information may also include hybrid automatic repeat request ACKnowledgement (HARQ-ACK). HARQ-ACK may indicate HARQ-ACK for downlink data (Transport block, Medium Access Control Protocol Data Unit (MAC PDU), Downlink-Shared Channel (DL-SCH)).

In addition, in the case of downlink wireless communication (radio communication from the base station apparatus 3 to the terminal apparatus 1), it is used to transmit downlink control information (DCI). Here, for transmission of downlink control information, one or a plurality of DCIs (also referred to as DCI formats) are defined. That is, a field for downlink control information is defined as DCI and mapped to information bits.

For example, as the DCI, a DCI including information indicating whether a signal included in the scheduled PSCH is wireless communication in downlink or uplink may be defined.

For example, as the DCI, a DCI including information indicating a downlink transmission period included in the scheduled PSCH may be defined.

For example, as the DCI, a DCI including information indicating an uplink transmission period included in the scheduled PSCH may be defined.

For example, as a DCI, a DCI including information indicating timing of transmitting HARQ-ACK for a scheduled PSCH (for example, the number of symbols from the last symbol included in the PSCH to the HARQ-ACK transmission) is defined. You may be.

For example, as the DCI, a DCI including information indicating a downlink transmission period, a gap, and an uplink transmission period included in the scheduled PSCH may be defined.

For example, as the DCI, a DCI used for scheduling of one downlink wireless communication PSCH (transmission of one downlink transport block) in one cell may be defined.

For example, as the DCI, a DCI used for scheduling of one uplink wireless communication PSCH (transmission of one uplink transport block) in one cell may be defined.

Here, the DCI includes information about scheduling of the PSCH when the uplink or downlink is included in the PSCH. Here, the DCI for the downlink is also called a downlink grant or a downlink assignment. Here, the DCI for the uplink is also referred to as an uplink grant or uplink assignment.

The PSCH is used for transmission of uplink data (UL-SCH: Uplink Shared CHannel) or downlink data (DL-SCH: Downlink Shared CHannel) from Medium Access Control (MAC). In addition, the downlink is also used for transmission of system information (SI) or random access response (RAR). In the case of uplink, it may be used to transmit HARQ-ACK and / or CSI together with uplink data. It may also be used for transmitting only CSI or only HARQ-ACK and CSI. That is, it may be used to transmit only UCI.

Here, the base station apparatus 3 and the terminal apparatus 1 exchange (transmit and receive) signals in a higher layer. For example, the base station apparatus 3 and the terminal apparatus 1 may also be referred to as RRC signaling (RRC message: Radio Resource Control message, RRC information: Radio Resource Control information) in a radio resource control (RRC) layer. May be transmitted and received. In addition, the base station apparatus 3 and the terminal apparatus 1 may transmit / receive a MAC control element in a medium access control (MAC) layer. Here, the RRC signaling and / or MAC control element is also referred to as higher layer signaling.

The PSCH may be used for transmitting the RRC signaling and the MAC control element. Here, the RRC signaling transmitted from the base station apparatus 3 may be common signaling for the plurality of terminal apparatuses 1 in the cell. In addition, the RRC signaling transmitted from the base station apparatus 3 may be dedicated signaling (also referred to as dedicated signaling) for a certain terminal apparatus 1. That is, the terminal device specific (UE special) information may be transmitted to the specific terminal device 1 using dedicated signaling. The PSCH may be used for transmission of the UE capability in the uplink.

In addition, although the PCCH and the PSCH use the same names in the downlink and the uplink, different channels may be defined in the downlink and the uplink.

For example, the downlink shared channel may be referred to as a physical downlink shared channel (PDSCH). The uplink shared channel may also be referred to as a physical uplink shared channel (PUSCH). In addition, the downlink control channel may be referred to as a physical downlink control channel (PDCCH). The uplink control channel may be referred to as a physical uplink control channel (PUCCH).

In Fig. 1, the following downlink physical signals are used in downlink wireless communication. Here, the downlink physical signal is not used to transmit the information output from the upper layer, but is used by the physical layer.

Synchronization signal (SS)

Reference signal (RS)

The synchronization signal may include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). The cell ID may be detected using the PSS and the SSS.

The synchronization signal is used for the terminal device 1 to synchronize the downlink frequency domain and time domain. Here, the synchronization signal may be used by the terminal apparatus 1 for the selection of the precoding or the beam in the precoding or the beam forming by the base station apparatus 3. The beam may also be called transmission or reception filter setting.

The reference signal is used by the terminal device 1 to compensate for propagation of the physical channel. Here, the reference signal may also be used for the terminal device 1 to calculate the downlink CSI. In addition, the reference signal may be used for fine synchronization such that the neurality such as radio parameters and subcarrier intervals, window synchronization of the FFT, and the like are possible.

In this embodiment, any one or more of the following downlink reference signals are used.

DMRS (Demodulation Reference Signal)

CSI-RS (Channel State Information Reference Signal)

PTRS (Phase Tracking Reference Signal)

MRS (Mobility Reference Signal)

DMRS is used to demodulate a modulated signal. In DMRS, two types of reference signals for demodulating the PBCH and reference signals for demodulating the PSCH may be defined, or both may be referred to as DMRS. The CSI-RS is used for beam state management and measurement of channel state information (CSI: Channel State Information). The PTRS is used to track the phase by the movement of the terminal or the like. The MRS may be used to measure reception quality from a plurality of base station apparatuses for handover. In the reference signal, a reference signal for compensating for phase noise may be defined.

The downlink physical channel and / or the downlink physical signal are collectively called a downlink signal. The uplink physical channel and / or the uplink physical signal are collectively called an uplink signal. The downlink physical channel and / or the uplink physical channel are collectively called a physical channel. The downlink physical signal and / or the uplink physical signal are collectively called a physical signal.

BCH, UL-SCH, and DL-SCH are transport channels. The channel used in the medium access control (MAC) layer is called a transport channel. A unit of a transport channel used in the MAC layer is also called a transport block (TB) and / or MAC protocol data unit (PDU). In the MAC layer, HARQ (Hybrid Automatic Repeat reQuest) is controlled for each transport block. The transport block is a unit of data delivered to the physical layer by the MAC layer. In the physical layer, a transport block is mapped to a codeword, and encoding processing is performed for each codeword.

In addition, the reference signal may be used for radio resource measurement (RRM). In addition, the reference signal may be used for beam management.

The beam management is an analog and / or digital beam in a transmitting apparatus (in the case of the downlink, the base station apparatus 3, and in the uplink, the terminal apparatus 1), and the receiving apparatus (in the case of the downlink). The base station apparatus 3 and / or the terminal apparatus 1 for acquiring the beam gain by matching the directivity of the analog and / or digital beams in the terminal apparatus 1 and the base station apparatus 3 in the uplink case). ) Procedure may be sufficient.

In addition, the following procedure may be included as a procedure for configuring, setting, or establishing a beam pair link.

Beam selection

Beam refinement

Beam recovery

For example, the beam selection may be a procedure for selecting a beam in communication between the base station apparatus 3 and the terminal apparatus 1. Further, the beam improvement may be a procedure of performing beam change between the base station apparatus 3 and the terminal apparatus 1 optimally by selecting a beam having a higher gain or by moving the terminal apparatus 1. In the communication between the base station apparatus 3 and the terminal apparatus 1, the beam recovery may be a procedure for reselecting the beam when the quality of the communication link is degraded due to a block cage generated by a shield or a person passing through.

The beam management may include beam selection and beam improvement. Beam recovery may also include the following procedure.

Detection of beam failure

Discovery of new beams

Sending Beam Recovery Requests

Monitor response to beam recovery requests

For example, when selecting the transmission beam of the base station apparatus 3 in the terminal apparatus 1, you may use the CSI-RS or the synchronization signal (for example, SSS) in a synchronization signal block, and the pseudo co-location (QCL) You can also use Quasi Co-Location.

If a long term property of a channel on which an antenna port is carried can be deduced from a channel on which a symbol on the other antenna port is carried, then the two antenna ports are QCL. Is said. Long-term characteristics of the channel include one or more of a delay spread, a Doppler spread, a Doppler shift, an average gain, and an average delay. For example, when the antenna port 1 and the antenna port 2 are QCL with respect to the average delay, it means that the reception timing of the antenna port 2 can be inferred from the reception timing of the antenna port 1.

This QCL can also be extended to beam management. For that purpose, a QCL extended to space may be newly defined. For example, as a long term property of a channel in assuming a QCL of a space, an angle of arrival (AoA (Angle of Arrival), ZenA (Zenith angle of Arrival), etc.) in a radio link or channel, and / Or Angle Spread (e.g. Angle Spread of Arrival (ASA) or Zenith angle Spread of Arrival (ZSA), angle of transmission (AoD, ZoD, etc.) or Angle Spread (e.g. ASD (e.g. Angle Spread of Departure (ZSS), Zenith Angle Spread of Departure (ZSS), and Spatial Correlation may be used.

By this method, the operations of the base station apparatus 3 and the terminal apparatus 1 equivalent to the beam management may be defined by the QCL assumption of space and radio resources (time and / or frequency) as the beam management.

The subframe will be described below. Although called a subframe in this embodiment, it may be called a resource unit, a radio frame, a time interval, a time interval, etc.

2 is a diagram illustrating an example of a schematic configuration of a downlink slot according to the first embodiment of the present invention. Each radio frame is 10 ms long. In addition, each of the radio frames includes 10 subframes and X slots. That is, the length of one sub frame is 1 ms. Each slot has a length of time defined by a subcarrier interval. For example, in the case of an OFDM symbol subcarrier interval of 15 ms and NCP (Normal Cyclic Prefix), X = 7 or X = 14, respectively, 0.5 ms and 1 ms. In the case where the subcarrier spacing is 60 ms, it is X = 7 or X = 14, respectively, 0.125 ms and 0.25 ms. 2 illustrates the case of X = 7 as an example. In the case of X = 14, it can be extended in the same manner. In addition, uplink slots are similarly defined, and downlink slots and uplink slots may be defined respectively.

The signal or physical channel transmitted in each of the slots may be represented by a resource grid. The resource grid is defined by a plurality of subcarriers and a plurality of OFDM symbols. The number of subcarriers constituting one slot depends on the bandwidth of the downlink and uplink of the cell, respectively. Each of the elements in the resource grid is called a resource element. The resource element may be identified using the number of subcarriers and the number of OFDM symbols.

Resource blocks are used to represent mappings of resource elements of certain physical downlink channels (such as PDSCH) or uplink channels (such as PUSCH). In the resource block, a virtual resource block and a physical resource block are defined. Some physical uplink channels are first mapped to virtual resource blocks. Thereafter, the virtual resource block is mapped to the physical resource block. The number of OFDM symbols included in the slot is X = 7, and in the case of NCP, one physical resource block is defined from seven consecutive OFDM symbols in the time domain and twelve consecutive subcarriers in the frequency domain. That is, one physical resource block includes (7 × 12) resource elements. In the case of Extended CP (ECP), one physical resource block is defined by, for example, six consecutive OFDM symbols in the time domain and twelve consecutive subcarriers in the frequency domain. That is, one physical resource block includes (6 × 12) resource elements. At this time, one physical resource block corresponds to one slot in the time domain, and in the case of a subcarrier interval of 15 Hz, it corresponds to 180 Hz (720 Hz in the case of 60 Hz) in the frequency domain. Physical resource blocks are numbered from zero in the frequency domain.

Next, the subframe, the slot, and the mini slot will be described. 3 is a diagram illustrating a relationship in the time domain of subframes, slots, and mini-slots. As shown in Fig. 3, three types of time units are defined. The subframe is 1 ms irrespective of the subcarrier interval, the number of OFDM symbols included in the slot is 7 or 14, and the slot length is different depending on the subcarrier interval. Here, when the subcarrier interval is 15 ms, one subframe includes 14 OFDM symbols. Therefore, the slot length may be defined as 0.5 / (Δf / 15) ms when the number of OFDM symbols constituting one slot is 7 when the subcarrier interval is Δf (㎑). Δf may be defined as the subcarrier spacing. In addition, when the number of OFDM symbols constituting one slot is seven, the slot length may be defined as 1 / (Δf / 15) ms. Δf may be defined as the subcarrier spacing. In addition, when the number of OFDM symbols included in the slot is X, the slot length may be defined as X / 14 / (Δf / 15) ms.

The mini slot (also referred to as a sub slot) is a time unit that includes fewer OFDM symbols than the number of OFDM symbols included in the slot. 3 shows, as an example, the case where the mini-slot includes 2OFDM symbols. The OFDM symbol in the mini slot may coincide with the OFDM symbol timing constituting the slot. In addition, the minimum unit of scheduling may be a slot or a mini slot.

4 is a diagram illustrating an example of a slot or subframe. Here, a case where the slot length is 0.5 ms in the subcarrier spacing of 15 ms is shown as an example. In FIG. 4, D represents a downlink and U represents an uplink. As shown in Figure 4, within a certain time interval (e.g., the minimum time interval that must be allocated for one UE in the system),

Downlink part (duration)

·gap

One or more of the uplink parts (duration) may be included.

Fig. 4A may also be referred to as a time unit (for example, a minimum unit of time resources that can be allocated to 1UE, a time unit, etc.) A plurality of minimum units of time resources may be referred to as a time unit. (B) of FIG. 4, the uplink scheduling is performed on the first time resource, for example, via the PCCH, and the processing delay of the PCCH and the uplink from the downlink. Transmit time of the uplink signal with a gap for generating the transmission signal. 4 (c) is used for transmission of a downlink PCCH and / or a downlink PSCH in an initial time resource, and has a processing delay and a downlink uplink switching time from downlink, and a PSCH with a gap for generation of a transmission signal. Or for transmission of a PCCH. Here, as an example, the uplink signal may be used for transmission of HARQ-ACK and / or CSI, that is, UCI. 4 (d) is used for transmission of a downlink PCCH and / or a downlink PSCH in an initial time resource, and is processed upstream with a processing delay and an uplink switching time from downlink and a gap for generating a transmission signal. It is used to transmit the PSCH and / or PCCH of the link. Here, as an example, the uplink signal may be used for transmission of uplink data, that is, UL-SCH. 4E is an example of all being used for uplink transmission (uplink PSCH or PCCH).

The downlink part and the uplink part described above may include a plurality of OFDM symbols similar to LTE.

5 is a diagram illustrating an example of beamforming. The plurality of antenna elements are connected to one transmission unit (TXRU: Transceiver unit) 10, and the phase shifter 11 for each antenna element controls the phase, and transmits from the antenna element 12 to the transmission signal. The beam may be directed in any direction. Typically, TXRU may be defined as an antenna port, and only the antenna port may be defined in the terminal device 1. Since the directivity can be directed in any direction by controlling the phase shifter 11, the base station apparatus 3 can communicate with the terminal apparatus 1 using a beam with high gain.

In the present embodiment, when a plurality of terminal devices 1 communicate using the same radio resource, a method of mapping PTRS to resource elements of each terminal device is shown. Here, the case where the plurality of terminal devices 1 communicate using the same radio resource may include, for example, a case where a multiuser-MIMO (MU-MIMO) that multiplexes the plurality of terminal devices 1 is used. do. In addition, as for the radio resources of the some terminal apparatus 1, all the radio resources may overlap and some radio resources may overlap.

8 is a diagram illustrating a first configuration example of PTRS according to the first method in the present embodiment. 8-1 and 8-2 are structural examples of the PTRS of each terminal device 1 in the case where two terminal devices 1 communicate using the same radio resource. 8-3 is a structural example of PTRS of each terminal device 1 in the case where three terminal devices 1 communicate using the same radio resource. In addition, each figure (FIGS. 8-1A to 8-3C) included in FIGS. 8-1, 8-2 and 8-3 is a diagram showing a position where PTRS is mapped in one resource block. The places filled with the gaps are the resource elements to which the PTRS is mapped, and the other places are the resource elements to which other than PTRS (data, DMRS or SRS) is mapped. 8 shows an example in which PTRSs of the plurality of terminal devices 1 are arranged at one frequency position, and the frequency position is, for example, a third frequency position from below. Here, the 1st method is a method of setting the arrangement position of PTRS of the some terminal apparatus 1 which communicates using the same resource to a different time position. That is, the first method is a method of orthogonalizing PTRSs of the plurality of terminal devices 1 in the time domain.

For example, when the terminal device 1A and the terminal device 1B communicate using the same radio resource, the arrangement of the PTRS of the terminal device 1A is shown in Figs. 8-1A, and the terminal device 1B The arrangement of PTRS may be referred to as Fig. 8-1B. For example, when the terminal apparatus 1A and the terminal apparatus 1B communicate using the same radio resource, the arrangement | positioning of PTRS of the terminal apparatus 1A shall be FIG. 8-2A, and the terminal apparatus 1B The arrangement of PTRS may be referred to as Fig. 8-2B. As described above, in Figs. 8-1 and 8-2, the PTRS of the terminal device 1A and the PTRS of the terminal device 1B are arranged in resource elements at different time positions at the same frequency position. For example, when the terminal apparatus 1A, the terminal apparatus 1B, and the terminal apparatus 1C communicate using the same radio resource, the arrangement | positioning of PTRS of the terminal apparatus 1A is set to FIG. 8-3A. The arrangement of PTRSs of the terminal device 1B may be referred to as Figs. 8-3B, and the arrangement of PTRSs of the terminal device 1C may be referred to as Figs. 8-3C. As described above, in Fig. 8-3, the PTRSs of the terminal apparatus 1A, the terminal apparatus 1B, and the terminal apparatus 1C are arranged in resource elements at different time positions at the same frequency position.

In addition, in FIG. 8, the number of the terminal apparatuses 1 which communicate using the same radio resource may be four or more, and the time position of PTRS mapped to each terminal apparatus 1 is not limited to FIG. . In addition, in FIG. 8, although the frequency position to which PTRS is mapped is set as the 3rd subcarrier from the bottom as an example, what is necessary is just one subcarrier in a resource block.

Each drawing in the following figures (FIGS. 9, 10, 11, 12, 13, and 14) is a diagram showing a position where PTRS is mapped in one resource block as in FIG. The places filled with the gaps are the resource elements to which the PTRS is mapped, and the other places are the resource elements to which other than PTRS (data, DMRS or SRS) is mapped.

In the downlink, the PTRS may be mapped only to resource elements other than the resource element to which the PSS, SSS, PBCH, DMRS, or CSI-RS is mapped. In the case of the downlink, the pattern may be defined such that the PTRS is mapped only to resource elements other than the resource element to which the PSS, SSS, PBCH, DMRS, or CSI-RS is mapped.

In the uplink, the PTRS may be mapped only to resource elements other than the resource element to which the DMRS or SRS is mapped. In the uplink, the pattern may be defined such that the PTRS is mapped only to resource elements other than the resource element to which the DMRS or the SRS is mapped.

9 is a diagram illustrating a second configuration example of the PTRS according to the first method in the present embodiment. 9 shows an example in which PTRSs of a plurality of terminal devices 1 are arranged at two frequency positions. 9-1 and 9-2 are structural examples of the PTRS of each terminal device 1 in the case where two terminal devices 1 communicate using the same radio resource.

For example, when the terminal device 1A and the terminal device 1B communicate using the same radio resource, the arrangement of the PTRS of the terminal device 1A is shown in Figs. 9-1A and the terminal device 1B The arrangement of PTRS may be referred to as Fig. 9-1B. For example, when the terminal apparatus 1A and the terminal apparatus 1B communicate using the same radio resource, the arrangement | positioning of PTRS of the terminal apparatus 1A shall be FIG. 9-2A, and the terminal apparatus 1B The arrangement of PTRSs may be referred to as Figs. 9-2B. As described above, in Figs. 9-1 and 9-2, the PTRS of the terminal device 1A and the PTRS of the terminal device 1B are arranged in resource elements at different time positions at the same frequency position.

In addition, in FIG. 9, the number of the terminal apparatuses 1 which communicate using the same radio resource may be two or more, and the time position of the PTRS mapped to each terminal apparatus 1 is not limited to FIG. In addition, the frequency position to which PTRS is mapped is not limited to FIG. 9, What is necessary is just two subcarriers in a resource block. In addition, although the example of the method of temporally orthogonally crossing PTRS on two subcarriers in a some terminal apparatus was shown in FIG. 9, three or more subcarriers may be sufficient.

10 is a diagram illustrating a third structural example of the PTRS according to the first method in the present embodiment. 10 shows an example in which PTRSs of a plurality of terminal devices 1 are arranged at one frequency position at regular time intervals. 10-1 and 10-2 are structural examples of the PTRS of each terminal device 1 in the case where two terminal devices 1 communicate using the same radio resource. 10-3 is a structural example of PTRS of each terminal device 1 in the case where three terminal devices 1 communicate using the same radio resource.

For example, when the terminal device 1A and the terminal device 1B communicate using the same radio resource, the arrangement of the PTRS of the terminal device 1A is shown in Figs. 10-1A and the terminal device 1B The arrangement of the PTRSs may be referred to as Figs. 10-1B. For example, when the terminal apparatus 1A and the terminal apparatus 1B communicate using the same radio resource, the arrangement | positioning of PTRS of the terminal apparatus 1A shall be FIG. 10-2A, and the terminal apparatus 1B The arrangement of PTRSs may be referred to as Figs. 10-2B. As described above, in Figs. 10-1 and 10-2, the PTRS of the terminal device 1A and the PTRS of the terminal device 1B are arranged in resource elements at different time positions at the same frequency position. Further, for example, when the terminal apparatus 1A, the terminal apparatus 1B, and the terminal apparatus 1C communicate using the same radio resource, the arrangement of the PTRS of the terminal apparatus 1A is shown in Figs. 10-3A. The arrangement of PTRSs of the terminal device 1B may be referred to as Figs. 10-3B, and the arrangement of PTRSs of the terminal device 1C may be referred to as Figs. 10-3C. As described above, in Fig. 10-3, the PTRSs of the terminal apparatus 1A, the terminal apparatus 1B, and the terminal apparatus 1C are arranged in resource elements at different time positions at the same frequency position.

In addition, in FIG. 10, the number of the terminal apparatuses 1 which communicate using the same radio resource may be four or more, and the time position of PTRS mapped to each terminal apparatus 1 is not limited to FIG. In addition, the interval where PTRS is arrange | positioned is not limited to FIG. For example, in FIG. 10-2, although PTRS is arrange | positioned for every two resource elements, three or more space | intervals which PTRS is arrange | positioned may be sufficient. In addition, for example, the interval where PTRS is arrange | positioned may not be constant the same interval, and PTRS may be arrange | positioned combining several intervals. In addition, in FIG. 10, although the frequency position to which PTRS is mapped is set as the 3rd subcarrier from the bottom as an example, what is necessary is just one subcarrier in a resource block.

11 is a diagram showing a fourth structural example of the PTRS according to the first method in the present embodiment. FIG. 11 shows an example in which PTRSs of a plurality of terminal devices 1 are arranged at regular time intervals at two frequency positions. 11-1, 11-2, and 11-3 are structural examples of the PTRS of each terminal device 1 in the case where two terminal devices 1 communicate using the same radio resource.

For example, when the terminal device 1A and the terminal device 1B communicate using the same radio resource, the arrangement of the PTRS of the terminal device 1A is shown in Figs. 11-1A and the terminal device 1B The arrangement of PTRS may be referred to as Fig. 11-1B. In addition, for example, when the terminal device 1A and the terminal device 1B communicate using the same radio resource, the arrangement of the PTRS of the terminal device 1A is shown in Figs. 11-2A and the terminal device 1B. The arrangement of PTRSs may be referred to as Figs. 11-2B. For example, when the terminal device 1A and the terminal device 1B communicate using the same radio resource, the arrangement of the PTRS of the terminal device 1A is shown in Figs. 11-3A, and the terminal device 1B is used. The arrangement of PTRS may be referred to as Figs. 11-3B. As described above, in Figs. 11-1, 11-2 and 11-3, the PTRS of the terminal device 1A and the PTRS of the terminal device 1B are resource elements having different time positions at the same frequency position. Is placed on.

In addition, in FIG. 11, two or more terminal devices 1 may communicate using the same radio resource, and the time position of PTRS mapped to each terminal device 1 is not limited to FIG. In addition, the space | interval in the time direction where PTRS is arrange | positioned is not limited to FIG. For example, in FIG. 11-3, although PTRS is arrange | positioned for every two time symbols, the interval which PTRS is arrange | positioned may be three or more. In addition, for example, the interval where PTRS is arrange | positioned may not be constant the same interval, and PTRS may be arrange | positioned combining several intervals. In addition, the frequency position to which PTRS is mapped is not limited to FIG. 11, What is necessary is just two subcarriers in a resource block. In addition, although FIG. 11 showed the example of the time orthogonalization of PTRS on two subcarriers in a some terminal apparatus, three or more subcarriers may be sufficient.

In this way, the PTRSs in the plurality of terminal devices 1 that communicate at the same time by the first method are arranged in resource elements at different time positions at the same frequency position. In addition, the time position is set by the base station apparatus 3, and may be set, activated, or indicated by RRC, MAC, or DCI. In addition, a time position may be determined based on the information which shows the unique ID of the terminal apparatus 1, For example, it is C-RNTI (Cell-Radio) as information which shows the unique ID of the terminal apparatus 1, for example. Network Temporary Identifier), a scramble ID, a user unique ID, a PTRS ID, or the like may be used. For example, the time position of the resource element to which the PTRS is mapped may be defined by an output generated using a pseudo random code initialized by C-RNTI (for example, M series, Gold series, PN series, etc.). . As a result, since the time position is uniquely determined based on the C-RNTI, the base station apparatus 3 and the terminal apparatus 1 determine the time position of the PTRS based on the C-RNTI. In this way, the time position of the resource element to which the PTRS is mapped may be determined using the unique ID of the terminal device 1.

The information indicating the unique ID of the terminal device 1 may be information that uniquely identifies the terminal device 1. The information indicating the unique ID of the terminal device 1 may be set by the base station device 3, or may be set, activated or instructed by the RRC, MAC, DCI, or the like. In addition, C-RNTI may be defined as a user ID for performing unicast data communication. In addition, the C-RNTI may be allocated from the base station apparatus 3 during the random access procedure. The unique ID of the terminal device 1 may be Temporaly C-RNTI or RA-RNTI (Random Access-Radio Network Temporary Identifier).

In addition, Temporaly C-RNTI or RA-RNTI may be used for the unique ID of the terminal device 1 during the random access procedure. In addition, the terminal device 1 may assume a fixed PTRS pattern during the random access procedure. Here, the fixed PTRS pattern may be a predetermined pattern based on, for example, MCS and / or scheduling bandwidth. In addition, the information which shows the unique ID of the terminal device 1 mentioned above may be similarly applied also in methods other than a 1st method.

In addition, the above-described scramble ID, user specific ID, and PTRS ID may be associated with the ID of DMRS. For example, when a scramble ID is notified to generate a DMRS, it may be defined that a resource (time, frequency, code, etc.) of the PTRS is determined using the scramble ID.

Here, FIG. 11-1A and FIG. 11-1B may be defined as different PTRS patterns, FIG. 11-1A is defined as one pattern, FIG. 11-1B and FIG. 11-1A are C-RNTI or user specific. You may define as having shifted the position of a resource element by time based on ID. That is, in this case, FIGS. 11-1A and 11-1B may be defined as the same pattern. 11-2 and 11-3 may also be the same, and may also be the same in each figure of FIG. 8, FIG. 9, and FIG.

In addition, zero power indication information may be set, or may be set, activated, or indicated by RRC, MAC, or DCI. The zero power indication information is information indicating the position of a resource element instructed to transmit by setting the transmission power to zero. For example, in the case of FIG. 8-1, the zero power instruction information of the terminal apparatus 1A is information indicating the position of the PTRS of the terminal apparatus 1B, and the zero power instruction information of the terminal apparatus 1B is the terminal. Information indicating the position of the PTRS of the device 1A. For example, in the case of Fig. 8-3, the zero power indication information of the terminal apparatus 1A is information indicating the position of the PTRS of the terminal apparatus 1B and the position of the PTRS of the terminal apparatus 1C. The zero power instruction information of 1B is information indicating the position of the PTRS of the terminal apparatus 1A and the position of the PTRS of the terminal apparatus 1C, and the zero power instruction information of the terminal apparatus 1C is the terminal apparatus 1A. Information indicating the position of the PTRS and the position of the PTRS of the terminal device 1B. The zero power indication information may be a position where the PTRS is arranged (for example, a subcarrier number (index) and / or a time symbol number (index), etc.), and a density (eg, continuous, Every other subcarrier, every other subcarrier, every other time symbol, every other time symbol, ratio of PTRS to number of subcarriers in one resource block, ratio of PTRS to number of time symbols in one resource block, etc.) It may be a combination of a position where the PTRS is arranged and a density where the PTRS is arranged (for example, a subcarrier number and a density combination of a time domain). In addition, the above-mentioned zero power instruction information may be similarly applied to methods other than the first method.

12 is a diagram illustrating an arrangement example of the first PTRS according to the second method in the present embodiment. 12-1 and 12-2 are structural examples of the PTRS of each terminal device 1 in the case where two terminal devices 1 communicate using the same radio resource. 12-3 is a structural example of PTRS of each terminal device 1 in the case where three terminal devices 1 communicate using the same radio resource. 12 is an example which arrange | positions PTRS of the some terminal apparatus 1 in 1 different frequency position, respectively. Here, the 2nd method is a method of setting the arrangement position of PTRS of the some terminal apparatus 1 which communicates using the same resource to a different frequency position. That is, the second method is a method of orthogonalizing PTRSs of the plurality of terminal devices 1 in the frequency domain.

For example, when the terminal device 1A and the terminal device 1B communicate using the same radio resource, the arrangement of the PTRS of the terminal device 1A is shown in Figs. 12-1A and the terminal device 1B The arrangement of PTRS may be referred to as Fig. 12-1B. For example, when the terminal apparatus 1A and the terminal apparatus 1B communicate using the same radio resource, the arrangement | positioning of PTRS of the terminal apparatus 1A shall be FIG. 12-2A, and the terminal apparatus 1B The arrangement of PTRS may be referred to as Fig. 12-2B. As described above, in Figs. 12-1 and 12-2, the PTRS of the terminal device 1A and the PTRS of the terminal device 1B are arranged in resource elements of one frequency position different from each other. For example, when the terminal device 1A, the terminal device 1B, and the terminal device 1C communicate using the same radio resource, the arrangement of the PTRS of the terminal device 1A is shown in Figs. 12-3A. 12-3B may be used as the arrangement of PTRS of the terminal device 1B, and 12-3C may be used as the arrangement of PTRS of the terminal device 1C. As described above, in Fig. 12-3, the PTRSs of the terminal apparatus 1A, the terminal apparatus 1B, and the terminal apparatus 1C are arranged in resource elements of one frequency position different from each other.

In addition, in FIG. 12, the number of the terminal devices 1 which communicate using the same radio resource may be four or more, and the frequency position of PTRS mapped to each terminal device 1 is not limited to FIG. In addition, in FIG. 12, although the time position where PTRS is mapped is continuous in the time direction, it may map every other one, and may map every other time symbol.

FIG. 13 is a diagram showing a second configuration example of PTRS according to the second method in the present embodiment. FIG. 13 shows an example in which PTRSs of a plurality of terminal devices 1 are arranged at two different frequency positions. 13-1 and 13-2 are structural examples of the PTRS of each terminal device 1 in the case where two terminal devices 1 communicate using the same radio resource.

For example, when the terminal device 1A and the terminal device 1B communicate using the same radio resource, the arrangement of the PTRS of the terminal device 1A is shown in Fig. 13-1A, and the terminal device 1B The arrangement of PTRS may be referred to as Fig. 13-1B. For example, when the terminal apparatus 1A and the terminal apparatus 1B communicate using the same radio resource, the arrangement | positioning of PTRS of the terminal apparatus 1A shall be FIG. 13-2A, and the terminal apparatus 1B The arrangement of PTRS may be referred to as Fig. 13-2B. As described above, in Figs. 13-1 and 13-2, the PTRS of the terminal device 1A and the PTRS of the terminal device 1B are arranged in resource elements of one frequency position different from each other.

In addition, in FIG. 13, two or more terminal apparatuses 1 may communicate using the same radio resource, and the frequency position of PTRS mapped to each terminal apparatus 1 is not limited to FIG. In addition, in FIG. 13, although the time position to which PTRS is mapped is continuous in the time direction, it may map every other one, and may map every other time symbol. The intervals in the time direction in which the PTRSs are arranged may not be the same constant intervals, or the PTRSs may be arranged in combination with a plurality of intervals.

In this way, by the second method, the PTRSs in the plurality of terminal devices 1 that communicate at the same time are arranged in resource elements at different frequency positions. In addition, the frequency position may be set by the base station apparatus 3 and may be set, activated or instructed by RRC, MAC, or DCI. In addition, the frequency position may be determined based on the information indicating the unique ID of the terminal device 1, and for example, C-RNTI, the scramble ID, User-specific ID, PTRS ID, etc. may be used. For example, the frequency position of the resource element to which the PTRS is mapped may be defined by an output generated using a pseudo random code initialized by C-RNTI (for example, M series, Gold series, PN series, etc.). . As a result, since the frequency position is uniquely determined based on the C-RNTI, the base station apparatus 3 and the terminal apparatus 1 determine the frequency position of the PTRS based on the C-RNTI. In this way, the frequency position of the resource element to which the PTRS is mapped may be determined using the unique ID of the terminal device 1. In addition, zero power indication information may be set or may be set, activated, or indicated by RRC, MAC, or DCI.

In addition, the above-described scramble ID, user unique ID, and PTRS ID may be associated with the ID of the DMRS. For example, when a scramble ID is notified to generate a DMRS, it may be defined that a resource (time, frequency, code, etc.) of the PTRS is determined using the scramble ID.

12-1A and 12-1B may be defined as different PTRS patterns, FIG. 12-1A is defined as one pattern, and FIG. 12-1B is shown in FIG. 12-1A as C-RNTI or user-specific ID. The resource element may be defined as being shifted in frequency by, for example. That is, in this case, FIGS. 12-1A and 12-1B may be defined as the same pattern. 12-2, 12-3, 13-1, and 13-2 may also be the same.

14 is a diagram illustrating an example of the configuration of a PTRS according to the third method of the present embodiment. 14-1, 14-2 and 14-3 are structural examples of the PTRS of each terminal device 1 in the case where three terminal devices 1 communicate using the same radio resource. Here, the third method is a method of setting the arrangement positions of the PTRSs of the plurality of terminal apparatuses 1 that communicate using the same resource as different frequency positions and time positions. That is, the third method is a method of orthogonalizing the arrangement positions of the PTRSs of the plurality of terminal devices 1 by the frequency direction and the time method.

For example, when the terminal device 1A, the terminal device 1B, and the terminal device 1C communicate using the same radio resource, the arrangement of the PTRS of the terminal device 1A is shown in Figs. 14-1A, The arrangement of PTRS of the terminal device 1B may be referred to as Fig. 14-1B, and the arrangement of PTRS of the terminal device 1C may be referred to as Fig. 12-1C. For example, the arrangement of PTRS of the terminal device 1A is shown in Fig. 14-2A, the arrangement of PTRS of the terminal device 1B is shown in Fig. 14-2B, and the arrangement of PTRS of the terminal device 1C is shown. It is good also as 12-2c. Further, for example, the arrangement of PTRS of the terminal device 1A is shown in Figs. 14-3A, the arrangement of PTRS of the terminal device 1B is shown in Figs. 14-23, and the arrangement of PTRS of the terminal device 1C is shown. It is good also as 12-3c. In this way, in FIG. 14, the PTRSs of the terminal device 1A, the terminal device 1B, and the terminal device 1C are arranged in resource elements of different frequency positions and time positions.

In this manner, by the third method, the PTRSs in the plurality of terminal devices 1 communicating at the same time are arranged in resource elements having different frequency positions and time positions. In addition, in FIG. 14, the number of the terminal devices 1 which communicate using the same radio resource may be four or more, and the frequency position and time position of PTRS mapped to each terminal device 1 are limited to FIG. It doesn't work. The time position where the PTRSs are mapped may be continuous in the time direction, may be mapped every other one, may be mapped at an arbitrary interval or a plurality of times, and the positions of the PTRSs of the respective terminal devices 1 may be orthogonal to each other. In addition, the frequency position and the time position may be determined based on the information indicating the unique ID of the terminal device 1, and for example, C-RNTI, A scramble ID, a user ID, PTRS ID, etc. may be used. For example, the frequency position and the time position of a resource element to which a PTRS is mapped by an output generated using a pseudo random code initialized by C-RNTI (e.g., M series, Gold series, PN series, etc.) May be defined. As a result, since the frequency position and the time position are uniquely determined based on the C-RNTI, the base station apparatus 3 and the terminal apparatus 1 determine the frequency position and the time position of the PTRS based on the C-RNTI. Decide In this way, the frequency position and the time position of the resource element to which the PTRS is mapped may be determined using the unique ID of the terminal device 1. In addition, zero power indication information may be set or may be set, activated, or indicated by RRC, MAC, or DCI.

In addition, the above-described scramble ID, user unique ID, and PTRS ID may be associated with the ID of the DMRS. For example, when a scramble ID is notified to generate a DMRS, it may be defined that a resource (time, frequency, code, etc.) of the PTRS is determined using the scramble ID.

Moreover, you may orthogonally cross PTRS in the some terminal apparatus 1 which communicates simultaneously by the 4th method. Here, the fourth method is a method of arranging PTRSs of a plurality of terminal apparatuses 1 communicating with the same radio resource at the same position and encoding or scrambled PTRSs to orthogonally or pseudo-orthogonally scramble. At this time, for example, a code of an orthogonal code and a pseudo random code (M series, Gold series, PN series, etc.) may be used. In addition, the encoded or scrambled sequence may be set, activated or indicated by RRC, MAC, or DCI. In addition, an index number may be associated with an encoded or scrambled sequence in advance, and the index number may be set, activated, or indicated by RRC, MAC, or DCI.

In addition, the pattern of PTRS may be the position where PTRS is arrange | positioned (for example, subcarrier number (index) and / or time symbol number (index)), and the density (for example, continuous, 1 sub which PTRS is arrange | positioned) Every other carrier, every other time symbol, every other time symbol, ratio of PTRS to number of subcarriers in one resource block, ratio of PTRS to number of time symbols in one resource block, etc.) It may be defined as a combination of a position where the PTRS is arranged and a density where the PTRS is arranged (for example, a subcarrier number and a density combination of a time domain). The density of the time domain and / or the frequency domain may be set by the MCS. In addition, the density of the time domain and / or the frequency domain may be set by the scheduling bandwidth (BW) or may be set by the scheduling bandwidth and the MCS.

In addition, the density of the time domain and the density of the frequency domain may be set under a plurality of conditions. The plurality of conditions may be selected one or more from a frequency band, a scheduling bandwidth, an MCS, a modulation method, a radio transmission method, and / or a moving speed of a terminal device. In addition, the pattern of the frequency direction may be arrange | positioned on one subcarrier, may be dispersefully disperse | distributed using a some subcarrier, and may be arranged continuously on a some subcarrier. In addition, PTRS may not be set, and when PTRS is not set, it may be represented by the information which shows the presence or absence of PTRS, and may be defined as a pattern which shows that it does not contain PTRS. The presence or absence of PTRS and / or the pattern of PTRS may be set, activated or indicated by RRC, MAC, or DCI. In addition, the pattern of PTRS may differ or may be the same by the radio transmission system.

In addition, the radio transmission scheme may be set, activated, or instructed by RRC, MAC, or DCI. As a result, the terminal device 1 may map the PTRS in consideration of the radio transmission method notified from the base station device 3.

When transmitting using a plurality of antennas, PTRSs may be orthogonal between antenna ports. In addition, the terminal device 1 may have the same antenna port for transmitting the PTRS and at least one port of the DMRS. For example, when the number of antenna ports of the DMRS is 2 and the number of antenna ports of the PTRS is 1, either of the antenna ports of the DMRS and the antenna port of the PTRS may be the same or both. In addition, QCL may be assumed for the antenna ports of DMRS and PTRS. For example, the frequency offset due to the phase noise of the DMRS is inferred from the frequency offset compensated with the PTRS. In addition, the DMRS may always be transmitted regardless of whether or not the PTRS is mapped.

The terminal device 1 does not have to map the PUSCH signal to the resource element to which the PTRS is mapped. In other words, when a signal of the PUSCH is not mapped, a rate match may be applied in which the PTRS is not a resource element capable of arranging the PUSCH signal in the mapped resource element. In addition, although the PUSCH signal is arranged in the resource element to which the PTRS is mapped, the signal may be overwritten by the PTRS. In this case, the base station apparatus 3 may assume that data is arranged in the resource element where PTRS is arranged, and may perform demodulation processing.

The processing of the base station apparatus 3 and the terminal apparatus 1 in this embodiment is shown below. In addition, here, the content mainly related to the setting of PTRS is demonstrated. In addition, although description is abbreviate | omitted, this embodiment is similarly applied also when three or more terminal apparatuses 1 are allocated to the same resource.

An example of the operation of the base station apparatus 3 in the case of applying the CP-OFDM radio transmission scheme in downlink transmission is shown. The base station apparatus 3 performs scheduling and sets the pattern of PTRS of the scheduled terminal apparatus 1. When a plurality of terminal apparatuses 1 are allocated to the same resource, the base station apparatus 3 sets a pattern of PTRS of each terminal apparatus 1. In this example, it is assumed that two terminal apparatuses 1 (terminal apparatus 1A and terminal apparatus 1B) are allocated to the same resource. The base station apparatus 3 may set the density of the PTRS and set the pattern of the PTRS based on the set density and / or a corresponding predefined pattern. The information indicating the unique ID of the terminal device 1 may be set by the base station device 3, or may be set, activated or instructed by the RRC, MAC, DCI, or the like.

As an example, assume that the density of the frequency domain of the two terminal apparatuses 1 is set in one resource block and the time domain density is set to 1/2 of the number of time symbols in one resource block. The base station apparatus 3 may set the PTRS of the terminal apparatus 1A to FIG. 8-1A and the PTRS of the terminal apparatus 1B to FIG. 8-1B using the 1st method, for example, The PTRS of 1A) may be set to FIGS. 10-1A and the PTRS of the terminal device 1B to FIGS. 10-1B. In addition, the base station apparatus 3 sets the PTRS of the terminal apparatus 1A and the terminal apparatus 1B to FIG. 8-1A or FIG. 10-1A, and based on the information which shows the unique ID of the terminal apparatus 1, In addition, you may determine the time position (or shift or offset of the time position with respect to FIG. 8-1A or 10-1A) of PTRS in each terminal device 1. For example, the C-RNTI may be initialized by a pseudo random code, and the time position may be associated with the initialized pseudo random sequence value. At this time, a pseudo random code may be designed so that the pattern of the pseudo random sequence matches the density of the time domain.

As an example, it is assumed that the density of the frequency domain of the two terminal apparatuses 1 is set in one resource block and the density of the time domain is continuously set. The base station apparatus 3 may set the PTRS of the terminal apparatus 1A to FIG. 12-1A and the PTRS of the terminal apparatus 1B to FIG. 12-1B using the second method. In addition, the base station apparatus 3 sets PTRS of the terminal apparatus 1A and the terminal apparatus 1B to FIG. 12-1A, and each terminal based on the information which shows the unique ID of the terminal apparatus 1, respectively. The frequency position (or shift or offset of the frequency position with respect to Fig. 12-1A) of the PTRS in the apparatus 1 may be determined. For example, the C-RNTI may be initialized by a pseudo random code, and the frequency position may be associated with the initialized pseudo random sequence value.

In addition, as an example, assume the case where the density of the frequency domain of three terminal apparatuses 1 is set to one in a resource block. Using the third method, the base station apparatus 3 uses the PTRS of the terminal apparatus 1A as shown in Fig. 14-1A, the PTRS of the terminal apparatus 1B as shown in Fig. 14-1B, and the PTRS of the terminal apparatus 1C as shown in Fig. 14. You may set it to -1c. In addition, the base station apparatus 3 sets PTRS of the terminal apparatus 1A, the terminal apparatus 1B, and the terminal apparatus 1C to FIG. 14-1A, and adds to the information which shows the unique ID of the terminal apparatus 1. FIG. Based on the frequency position (or shift or offset of the frequency position with respect to FIG. 14-1A) and the time position (or shift of time position with respect to FIG. 14-1A) in each terminal apparatus 1 Offset) may be determined.

Further, in the first, second and third methods, when the position of the PTRS is determined based on the information indicating the unique ID of the terminal device 1, the PTRS of the multiplexing terminal device 1 is orthogonal to each other. There may be a point which is not. The base station apparatus 3 may set the transmission power of the designated resource block to zero based on the zero power instruction information.

In addition, the base station apparatus 3 sets the PTRS of the terminal apparatus 1A and the terminal apparatus 1B in the same pattern using the fourth method, encodes or scrambles the PTRS, thereby orthogonally or pseudo-orthogonally, You may scramble. For example, at this time, the index number associated with the encoded or scrambled sequence may be set, activated, or indicated by RRC, MAC, or DCI as the encoded index number.

The PTRS setting method (first method, second method, third method, or fourth method) may be set, activated, or instructed by RRC, MAC, or DCI. At this time, the pattern set in each terminal device 1 may be set, activated or instructed by RRC, MAC or DCI.

In the downlink transmission, an example of the operation of the terminal apparatus 1 in the case of applying the CP-OFDM radio transmission scheme is shown. The terminal device 1 receives the signal transmitted from the base station device 3, determines the pattern of the PTRS, and tracks the phase noise using the PTRS. For example, the terminal device 1 may determine the pattern of the PTRS in the same procedure as that of the PTRS setting rule in the base station apparatus 3, or may determine the pattern of the PTRS using the information notified by the DCI. do. For example, the density of PTRS may be determined using MCS and / or scheduling bandwidth.

In addition, the terminal device 1 may determine the position of the PTRS using information indicating a unique ID of the terminal device 1 and / or a coding index number and / or a method of setting the PTRS. For example, in the case of the first method, the terminal device 1 initializes the C-RNTI by a pseudo random code and PTRSs the time position (or shift of the time position) associated with the initialized pseudo random sequence value. It may be set as a time position of. For example, in the case of the second method, the terminal apparatus 1 initializes the C-RNTI by a pseudo random code and shifts the frequency position (or shift of the frequency position or the like) corresponding to the initialized pseudo random sequence value. Offset) may be a frequency position of PTRS. Further, for example, in the third method, the terminal device 1 initializes the C-RNTI by a pseudo random code and shifts the frequency position (or shift of the frequency position or the like) corresponding to the initialized pseudo random sequence value. Offset) and time position (or shift or offset of time position) may be the frequency position and time position of PTRS. For example, in the case of the fourth method, the terminal device 1 may determine the PTRS associated with the coding index number based on the coding index number. In addition, when a plurality of PTRS setting methods are introduced into the communication system, the terminal device 1 determines the setting method of the PTRS set or activated in the base station apparatus 3 and based on the determined PTRS setting method. The above processing may be performed.

In the uplink transmission, an example of the operation of the base station apparatus 3 in the case of applying the CP-OFDM radio transmission scheme is shown. The base station apparatus 3 receives a signal transmitted from the terminal apparatus 1 and tracks phase noise using PTRS. The base station apparatus 3 also performs scheduling to set information necessary for setting the PTRS when the terminal apparatus 1 transmits on the uplink. The information necessary for setting the PTRS is, for example, the time position (or shift or offset of the time position) and / or the frequency position (or shift or offset of the frequency position) and / or zero power indication information and / or of the PTRS. PTRS setting method etc. may be included. In addition, when a plurality of terminal apparatuses 1 are allocated to the same resource and the fourth method is applied, the index number associated with the encoded or scrambled sequence is a coded index number, which is set by RRC, MAC, or DCI. It may be activated or indicated. The zero power indication information may be set, activated or instructed by RRC, MAC or DCI. The information indicating the unique ID of the terminal device 1 may be set by the base station device 3, or may be set, activated or instructed by the RRC, MAC, DCI, or the like.

An example of the operation of the terminal apparatus 1 in the case of applying the CP-OFDM radio transmission method in uplink transmission is shown. The terminal device 1 sets the pattern of the PTRS when the terminal device 1 transmits on the uplink based on the information set in the base station device 3. The terminal device 1 may set the pattern of PTRS using the information notified by DCI. For example, the terminal apparatus 1 may set the density of PTRS using MCS and / or scheduling bandwidth.

In addition, the terminal device 1 uses the information indicating the unique ID of the terminal device 1 and / or zero power indication information and / or the coding index number and / or the method of setting the PTRS, and the like. Or a shift or offset of a position). For example, in the case of the first method, the terminal apparatus 1 initializes the C-RNTI by a pseudo random code and shifts or offsets the time position (or a time position corresponding to the value of the initialized pseudo random sequence). May be a time position of PTRS. For example, in the case of the second method, the terminal apparatus 1 initializes the C-RNTI by a pseudo random code and shifts the frequency position (or shift of the frequency position or the like) corresponding to the initialized pseudo random sequence value. Offset) may be a frequency position of PTRS. Further, for example, in the third method, the terminal device 1 initializes the C-RNTI by a pseudo random code and shifts the frequency position (or shift of the frequency position or the like) corresponding to the initialized pseudo random sequence value. Offset) and time position (or shift or offset of time position) may be the frequency position and time position of PTRS. For example, in the case of the fourth method, the terminal device 1 sets the PTRS associated with the coding index number based on the coding index number.

In addition, when a plurality of PTRS setting methods are introduced into the communication system, the terminal device 1 determines the setting method of the PTRS set or activated in the base station apparatus 3 and based on the determined PTRS setting method. The above processing may be performed. The terminal device 1 may set the transmission power of the designated resource block to 0 based on the zero power instruction information.

An example of the operation of the base station apparatus 3 and the terminal apparatus 1 in the case of applying the radio transmission method of DFTS-OFDM (SC-FDM) in uplink transmission is shown. In addition, the description here mainly focuses on the difference from the case where CP-OFDM is applied in uplink transmission.

In the case of DFTS-OFDM, the terminal device 1 may insert the PTRS symbol at a specific time position before inputting the DFT. For example, if the number of scheduled PRBs is 4 (= 60 modulation symbols) mapped to resource elements with frequency first, 6, 18 (= 12) of time symbols input to the DFT when generating each DFTS-OFDM symbol The DFT may be spread as PTRS in the +6), 30 (12 * 2 + 6), and 42 (12 * 3 + 6) th symbols. In addition, it may be mapped to a resource element with a time first, and the DFT may be spread by inserting a PTRS in the first X symbol. DFT spreading may be performed by inserting a PTRS into an X symbol in a specific DFTS-OFDM symbol in a slot. X may be the number of DFTS-OFDM symbols included in the slot. In addition, the PTRS symbol may be mapped to a specific pattern before the DFT. In addition, after the DFT spreading, the PTRS may be arranged in time and / or frequency. The PTRS pattern input before the DFT may be determined by the ID indicated by C-RNTI, DCI, or the like.

One aspect of this embodiment may be operated in carrier aggregation or dual connectivity with Radio Access Technology (RAT) such as LTE and LTE-A / LTE-A Pro. In this case, some or all of the cells or cell groups, carriers or carrier groups (eg, Primary Cell (PCell), Secondary Cell (SCell), Primary Secondary Cell (PSCell), MCG (Master Cell) Group), SCG (Secondary Cell Group, etc.) may be used. It may also be used as a standalone to operate independently.

Hereinafter, the structure of the apparatus in this embodiment is demonstrated. Here, an example of a case where CP-OFDM or DFTS-OFDM (SC-FDM) is applied as the downlink radio transmission method and the uplink radio transmission method is shown.

6 is a schematic block diagram showing the configuration of the terminal device 1 of the present embodiment. As shown in the drawing, the terminal device 1 includes an upper layer processor 101, a controller 103, a receiver 105, a transmitter 107, and a transmission / reception antenna 109. As shown in FIG. The upper layer processor 101 includes a radio resource controller 1011, a scheduling information analyzer 1013, and a channel state information (CSI) report controller 1015. The receiver 105 includes a decoder 1051, a demodulator 1053, a multiple separator 1055, a radio receiver 1057, and a measurer 1059. The transmitter 107 includes an encoder 1071, a modulator 1073, a multiplexer 1075, a radio transmitter 1077, and an uplink reference signal generator 1079.

The upper layer processing unit 101 outputs the uplink data (transport block) generated by the user's operation or the like to the transmission unit 107. In addition, the upper layer processor 101 may include a medium access control (MAC) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a radio resource control. The (Radio Resource Control: RRC) layer is processed.

The radio resource control unit 1011 included in the upper layer processing unit 101 manages various setting information of the own device. In addition, the radio resource control unit 1011 generates information arranged in each uplink channel and outputs the information to the transmission unit 107.

The scheduling information analysis unit 1013 included in the upper layer processing unit 101 analyzes the DCI (scheduling information) received through the reception unit 105, and based on the result of analyzing the DCI, the reception unit 105 and In order to control the transmitter 107, control information is generated and output to the controller 103.

The CSI report control unit 1015 instructs the measurement unit 1059 to derive channel state information (RI / PMI / CQI / CRI) related to the CSI reference resource. The CSI report control unit 1015 instructs the transmission unit 107 to transmit RI / PMI / CQI / CRI. The CSI report control unit 1015 sets a setting that the measurement unit 1059 uses when calculating the CQI.

The control unit 103 generates control signals for controlling the reception unit 105 and the transmission unit 107 based on the control information from the upper layer processing unit 101. The control unit 103 outputs the generated control signal to the receiving unit 105 and the transmitting unit 107 to control the receiving unit 105 and the transmitting unit 107.

The receiving unit 105 separates, demodulates, decodes, and decodes the received signal received from the base station apparatus 3 through the transmission / reception antenna 109 according to the control signal input from the control unit 103, and the higher layer processing unit. Output to (101).

The radio receiver 1057 converts the downlink signal received through the transmit / receive antenna 109 to an intermediate frequency (down covert), removes unnecessary frequency components, and amplifies the signal level to be maintained properly. The level is controlled, and orthogonal demodulation is performed based on the in-phase component and quadrature component of the received signal, and the orthogonal demodulated analog signal is converted into a digital signal. The radio receiver 1057 removes the portion corresponding to the Guard Interval (GI) from the converted digital signal, performs Fast Fourier Transform (FFT) on the signal from which the guard interval has been removed, and performs a frequency domain. Extract the signal of.

The multiplexer 1055 separates the extracted signal into a downlink PCCH, a PSCH, and a downlink reference signal. In addition, the multiplexing section 1055 compensates for the propagation paths of the PCCH and PSCH from the estimated values of the propagation paths input from the measuring unit 1059. In addition, the multiplexer 1055 outputs the separated downlink reference signal to the measurement unit 1059.

The demodulator 1053 demodulates the downlink PCCH and outputs it to the decoder 1051. The decoding unit 1051 attempts to decode the PCCH, and when decoding succeeds, the decoding unit 1051 outputs to the upper layer processing unit 101 an RNTI corresponding to the decoded downlink control information and the downlink control information.

The demodulator 1053 demodulates the PSCH to a decoding unit 1051 by demodulating a modulation scheme notified by downlink grants such as Quadrature Phase Shift Keying (QPSK), Quadrature Amplitude Modulation (16QAM), 64QAM, and 256QAM. Output The decoding unit 1051 performs decoding on the basis of the information about the transmission or original coding rate notified by the downlink control information, and outputs the decoded downlink data (transport block) to the upper layer processing unit 101.

The measuring unit 1059 performs downlink path loss measurement, channel measurement, and / or interference measurement from the downlink reference signal input from the multiple separation unit 1055. The measurement unit 1059 outputs the CSI calculated based on the measurement result, and the measurement result to the upper layer processing unit 101. The measurement unit 1059 calculates an estimated value of the downlink propagation path from the downlink reference signal and outputs the estimated value to the multiple separation unit 1055.

The transmitter 107 generates an uplink reference signal according to the control signal input from the controller 103, encodes and modulates uplink data (transport block) input from the upper layer processor 101, PUCCH, The PUSCH and the generated uplink reference signal are multiplexed and transmitted to the base station apparatus 3 via the transmit / receive antenna 109.

The encoding unit 1071 encodes the uplink control information input from the upper layer processing unit 101 and the uplink data. The modulator 1073 modulates the coded bits input from the encoder 1071 in a modulation scheme such as BPSK, QPSK, 16QAM, 64QAM, 256QAM, and the like.

The uplink reference signal generation unit 1079 includes a physical cell identity (called a PCI, Cell ID, etc.) for identifying the base station apparatus 3, a bandwidth for placing the uplink reference signal, and an uplink grant. Based on the reported cyclic shift, the value of the parameter for generation of the DMRS sequence, and the like, a sequence obtained by a predetermined rule (expression) is generated.

The multiplexer 1075 determines the number of layers of the PUSCH to be spatially multiplexed based on the information used for scheduling of the PUSCH, and uses the MIMO SM (Multiple Input Multiple Output Spatial Multiplexing) to the same PUSCH. A plurality of uplink data transmitted is mapped to a plurality of layers, and precoding is performed on the layers.

The multiplexer 1075 performs Discrete Fourier Transform (DFT) on the modulation symbols of the PSCH in accordance with the control signal input from the control unit 103. The multiplexer 1075 multiplexes the signals of the PCCH and PSCH and the generated uplink reference signals for each transmission antenna port. That is, the multiplexer 1075 arranges the signals of the PCCH and PSCH and the generated uplink reference signals in resource elements for each transmission antenna port.

The wireless transmitter 1077 performs an Inverse Fast Fourier Transform (IFFT) on the multiplexed signal to perform SC-FDM modulation, and adds a guard interval to the SC-FDM modulated SC-FDM symbol. Generate baseband digital signals, convert baseband digital signals to analog signals, generate in-phase and quadrature components of intermediate frequencies from analog signals, remove extra frequency components for intermediate frequency bands, and The frequency signal is converted (up-converted) into a high frequency signal, excess frequency components are removed, power amplified, and output to the transmit / receive antenna 109 for transmission.

7 is a schematic block diagram showing the configuration of the base station apparatus 3 of the present embodiment. As shown in the drawing, the base station apparatus 3 includes an upper layer processor 301, a controller 303, a receiver 305, a transmitter 307, and a transmission / reception antenna 309. The upper layer processing unit 301 includes a radio resource control unit 3011, a scheduling unit 3013, and a CSI report control unit 3015. The receiver 305 includes a decoder 3031, a demodulator 3053, a multiple separator 3055, a radio receiver 3057, and a measurer 3059. The transmitter 307 includes an encoder 3031, a modulator 3073, a multiplexer 3075, a radio transmitter 3077, and a downlink reference signal generator 3079.

The upper layer processor 301 may include a medium access control (MAC) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a radio resource control (Radio). Resource Control: RRC) layer processing. In addition, the upper layer processing unit 301 generates control information and outputs the control information to the control unit 303 to control the receiving unit 305 and the transmitting unit 307.

The radio resource control unit 3011 included in the higher layer processing unit 301 generates downlink data (transport block), system information, RRC message, MAC CE (Control Element), and the like arranged in the downlink PSCH, or It acquires from an upper node, and outputs it to the transmitter 307. FIG. In addition, the radio resource control unit 3011 manages various setting information of each of the terminal devices 1.

The scheduling unit 3013 included in the higher layer processing unit 301 allocates a physical channel (PSCH) and a frequency to which the physical channel (PSCH) is allocated based on the received CSI and the estimated value of the propagation path input from the measurement unit 3059, the channel quality, and the like. The transmission code rate, modulation scheme, and transmission power of the physical channel (PSCH) are determined. The scheduling unit 3013 generates control information and outputs the control information to the control unit 303 to control the reception unit 305 and the transmission unit 307 based on the scheduling result. The scheduling unit 3013 generates information (for example, DCI (format)) used for scheduling of the physical channel (PSCH) based on the scheduling result.

The CSI report control unit 3015 included in the upper layer processing unit 301 controls the CSI report of the terminal device 1. The CSI report control unit 3015 uses the transmission unit 307 to provide information indicating various settings that the terminal device 1 assumes in order to derive RI / PMI / CQI in the CSI reference resource. Send to

The control unit 303 generates control signals for controlling the reception unit 305 and the transmission unit 307 based on the control information from the upper layer processing unit 301. The control unit 303 outputs the generated control signal to the receiving unit 305 and the transmitting unit 307 to control the receiving unit 305 and the transmitting unit 307.

The receiving unit 305 separates, demodulates, and decodes the received signal received from the terminal apparatus 1 through the transmitting / receiving antenna 309 according to the control signal input from the control unit 303, and uses the higher layer processing unit ( 301). The radio receiver 3057 converts an uplink signal received through the transmit / receive antenna 309 to an intermediate frequency (down covert), removes unnecessary frequency components, and amplifies the signal level so that it is properly maintained. The level is controlled, and orthogonal demodulation is performed based on the in-phase and quadrature components of the received signal, and the orthogonal demodulated analog signal is converted into a digital signal.

The radio receiver 3057 removes a portion corresponding to a guard interval (GI) from the converted digital signal. The radio receiver 3057 performs a Fast Fourier Transform (FFT) on the signal from which the guard interval has been removed, extracts a signal in the frequency domain, and outputs the signal in the multiple separation unit 3055.

The multiplexer 1055 separates a signal input from the radio receiver 3057 into a signal such as a PCCH, a PSCH, an uplink reference signal, and the like. In addition, this separation is performed based on the allocation information of the radio resources included in the uplink grant which the base station apparatus 3 previously determined by the radio resource control unit 3011 and notified each terminal apparatus 1. The multiple separation unit 3055 compensates the PCCH and PSCH propagation paths from the estimated values of the propagation paths input from the measurement unit 3059. In addition, the multiplexer 3055 outputs the separated uplink reference signal to the measurement unit 3059.

The demodulator 3053 obtains a modulation symbol by performing an Inverse Discrete Fourier Transform (IDFT) on the PSCH, and performs BPSK (Binary Phase Shift Keying), QPSK, and 16QAM on each of the PCCH and PSCH modulation symbols. And demodulation of the received signal using a predetermined modulation scheme such as 64QAM, 256QAM, or the like, which is notified to the terminal apparatus 1 by the uplink grant in advance. The demodulator 3053 uses the MIMO SM based on the number of spatially multiplexed sequences previously notified to each of the terminal apparatuses 1 as an uplink grant and information indicating the precoding to be performed on the sequences. The modulation symbols of the plurality of uplink data transmitted by the PSCH are separated.

The decoding unit 3051 decodes the coded bits of the demodulated PCCH and PSCH at a transmission or original coding rate of a predetermined encoding method or a self-device notified to the terminal device 1 as an uplink grant in advance. And decoded uplink data and uplink control information to the upper layer processing unit 101. When the PSCH is retransmission, the decoding unit 3051 decodes using the coded bits held in the HARQ buffer input from the higher layer processing unit 301 and the demodulated coded bits. The measurement unit 3059 measures the estimated value of the propagation path, the quality of the channel, and the like from the uplink reference signal input from the multiple separation unit 3055, and outputs the result to the multiple separation unit 3055 and the higher layer processing unit 301.

The transmitter 307 generates a downlink reference signal in accordance with a control signal input from the controller 303, encodes and modulates downlink control information and downlink data input from the upper layer processor 301, and performs PCCH, The PSCH and the downlink reference signal are transmitted to the terminal device 1 through the transmit / receive antenna 309 with multiple or respective radio resources.

The encoding unit 3071 encodes downlink control information and downlink data input from the higher layer processing unit 301. The modulator 3073 modulates the coded bits input from the encoder 3031 in a modulation scheme such as BPSK, QPSK, 16QAM, 64QAM, 256QAM, and the like.

The downlink reference signal generation unit 3079 downlinks the sequence of which the terminal device 1 is known, which is obtained by a predetermined rule based on a physical cell identifier (PCI) or the like for identifying the base station device 3. Generated as a reference signal.

The multiplexer 3075 maps one or a plurality of downlink data transmitted in one PSCH to one or a plurality of layers according to the number of layers of the PSCH to be spatially multiplexed, and the one or a plurality of layers. Precoding is performed on the layer. The multiplexer 3075 multiplexes the downlink physical channel signal and the downlink reference signal for each transmit antenna port. The multiplexer 3075 places a signal of a downlink physical channel and a downlink reference signal in a resource element for each transmit antenna port.

The wireless transmitter 3077 performs an Inverse Fast Fourier Transform (IFFT) on the multiplexed modulation symbols and the like, performs an OFDM modulation, and adds a guard interval to the OFDM modulated OFDM symbol to provide a baseband digital signal. Generate a signal, convert the baseband digital signal into an analog signal, generate in-phase and quadrature components of the intermediate frequency from the analog signal, remove the extra frequency components for the intermediate frequency band, and The signal is converted (up-converted) to a high frequency signal, the excess frequency component is removed, the power is amplified, output to the transmit / receive antenna 309, and transmitted.

(1) More specifically, the terminal device 1 according to the first aspect of the present invention is a terminal device that communicates with a base station device, and includes a first reference signal, a second reference signal, and a physical uplink shared channel. And a receiver for receiving a physical downlink control channel, wherein the physical uplink shared channel is transmitted based on the downlink control information received by the physical downlink control channel, The reference signal is disposed in some resource element in the resource block determined based on the downlink control information, and the second reference signal is generated based on the first information that uniquely identifies the terminal device.

(2) In the first aspect, the first information is C-RNTI.

(3) In the first aspect, the first information is a scramble ID included in the downlink control information.

(4) In the first aspect, the first information is a user-specific ID included in the downlink control information.

(5) In the first aspect, the second reference signal is encoded or scrambled using a predetermined encoding method, and the downlink control information includes an index number for identifying the encoded or scrambled sequence. do.

(6) In the first aspect, in the first information, the downlink control information includes second information indicating that the transmission power in a part of the resource element of the second reference signal is zero. do.

(7) The base station apparatus 3 according to the second aspect of the present invention is a base station apparatus that communicates with a terminal apparatus, and includes: a transmitter for transmitting first information through a physical downlink control channel, a first reference signal, and a first reference apparatus. And a receiving unit for receiving a physical uplink shared channel, wherein the first reference signal is disposed in some resource elements in a resource block determined based on the downlink control information, and the second reference signal. Is generated based on the first information that uniquely identifies the plurality of terminal devices arranged in the same resource.

(8) The communication method in the third aspect of the present invention is a communication method of a terminal device that communicates with a base station apparatus, and transmits a first reference signal, a second reference signal, and a physical uplink shared channel, Receives a downlink control channel, the physical uplink shared channel is transmitted based on downlink control information received by the physical downlink control channel, and the first reference signal is based on the downlink control information. The second reference signal is generated based on first information for uniquely identifying the terminal device.

(9) The communication method according to the fourth aspect of the present invention is a communication method of a base station apparatus that communicates with a terminal apparatus, and transmits first information through a physical downlink control channel, and includes a first reference signal and a second reference. Receives a signal and a physical uplink shared channel, wherein the first reference signal is disposed in some resource element in the resource block determined based on the downlink control information, and the second reference signal is disposed in the same resource And generated based on the first information for uniquely identifying the plurality of terminal devices.

(10) An integrated circuit in a fifth aspect of the present invention is an integrated circuit mounted in a terminal device that communicates with a base station apparatus, and transmits a first reference signal, a second reference signal, and a physical uplink shared channel. A transmitting means and receiving means for receiving a physical downlink control channel, wherein the physical uplink shared channel is transmitted based on the downlink control information received by the physical downlink control channel, the first reference The signal is disposed in some resource element in the resource block determined based on the downlink control information, and the second reference signal is generated based on the first information that uniquely identifies the terminal device.

(11) An integrated circuit according to a sixth aspect of the present invention is an integrated circuit mounted in a base station apparatus that communicates with a terminal apparatus, including transmission means for transmitting first information through a physical downlink control channel, and a first reference signal. And receiving means for receiving a second reference signal and a physical uplink shared channel, wherein the first reference signal is disposed in some resource element in a resource block determined based on the downlink control information, The second reference signal is generated based on the first information that uniquely identifies the plurality of terminal devices arranged in the same resource.

The program operating in the apparatus according to one aspect of the present invention may be a program that controls a Central Processing Unit (CPU) or the like so as to realize a function of the embodiment according to one aspect of the present invention. The program or information handled by the program is temporarily stored in volatile memory such as Random Access Memory (RAM) or nonvolatile memory such as flash memory, Hard Disk Drive (HDD), or other storage system.

In addition, a program for realizing the functions of the embodiment of the present invention may be recorded on a computer-readable recording medium. The program recorded on the recording medium may be read by a computer system and executed. The "computer system" as used herein is a computer system built into the apparatus, and includes hardware such as an operating system or a peripheral device. The "computer-readable recording medium" may be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a medium for dynamically holding a program for a short time, or another recording medium that can be read by a computer.

In addition, each functional block or various features of the apparatus used in the above-described embodiment can be mounted or executed in an electric circuit, for example, an integrated circuit or a plurality of integrated circuits. Electrical circuits designed to perform the functions described herein include general purpose processors, digital signal processors (DSPs), special purpose integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discretes. Gate or transistor logic, discrete hardware components, or a combination thereof may be included. The general purpose processor may be a microprocessor, or may be a conventional processor, controller, microcontroller or state machine. The electrical circuit described above may include a digital circuit or may include an analog circuit. In addition, when the technology of integrated circuits to replace the current integrated circuits appears due to the advancement of semiconductor technology, one or more aspects of the present invention can also use new integrated circuits according to the technology.

In addition, although the embodiment which concerns on one aspect of this invention applied to the communication system containing a base station apparatus and a terminal apparatus was described, it also applies to the system with which terminals communicate, such as D2D (Device to Device). It is possible.

In addition, this invention is not limited to embodiment mentioned above. In the embodiment, an example of the apparatus has been described, but the present invention is not limited thereto, but a stationary or non-movable electronic apparatus installed inside or outside, for example, an AV apparatus, a kitchen apparatus, a cleaning / laundry apparatus, an air conditioning apparatus, The present invention can be applied to terminal devices or communication devices such as office devices, vending machines, and other living devices.

As mentioned above, although embodiment of this invention was described in detail with reference to drawings, a specific structure is not limited to this embodiment, The design change etc. of the range which do not deviate from the summary of this invention are included. In addition, one aspect of this invention can be variously changed in the range shown to the claim, and is also contained in the technical scope of this invention also about embodiment obtained by combining suitably the technical means respectively disclosed in other embodiment. Moreover, it is an element described in each said embodiment, and the structure which substituted the elements which exhibit the same effect is also included.

One aspect of the present invention is, for example, a communication system, a communication device (for example, a cellular phone device, a base station device, a wireless LAN device, or a sensor device), an integrated circuit (for example, a communication chip), a program, or the like. It can be used.

1 (1A, 1B, 1C): terminal device
3: base station apparatus
10: TXRU
11: phase shifter
12: antenna
101: upper layer processing unit
103: control unit
105: receiver
107: transmitting unit
109: antenna
301: upper layer processing unit
303: control unit
305: receiving unit
307: transmitting unit
1011: radio resource control unit
1013: scheduling information analysis unit
1015: channel status information reporting control unit
1051: decryption unit
1053: demodulator
1055: multiple separator
1057: wireless receiver
1059: measuring unit
1071: encoder
1073: modulator
1075: multiple parts
1077: wireless transmission unit
1079: uplink reference signal generator
3011: radio resource control unit
3013: scheduling unit
3015: channel state information reporting control unit
3051: decryption unit
3053: demodulator
3055: multiple separator
3057: wireless receiver
3059: measuring unit
3071: encoder
3073: modulator
3075: multiple parts
3077: wireless transmission unit
3079: downlink reference signal generator

Claims (10)

A terminal device that communicates with the base station device,
A multiple part for mapping a PTRS signal generated by a pseudo random code to a resource element,
A transmitter for transmitting a PUSCH,
The multiplexer maps the PTRS signal to a subcarrier based at least on the offset of the frequency position, the C-RNTI, the number of scheduled resource blocks, and the frequency density of the PTRS.
The transmitter is a terminal device, characterized in that for transmitting the PUSCH mapped PTRS. The method of claim 1,
The terminal device characterized in that the frequency density of the PTRS includes the case of every one sub-carrier. The method of claim 1,
And a receiving unit for receiving an RRC signal,
The offset information of the frequency position is characterized in that the terminal is notified by the RRC. The method of claim 1,
And a receiving unit for receiving an RRC signal,
A plurality of the PTRSs to the same resource element,
In case of coding or scrambled arrangement,
The index number for identifying the encoded or scrambled sequence is
Terminal device characterized in that notified by the RRC. The method of claim 1,
And a receiving unit for receiving an RRC signal,
Information indicating that transmission power in a part of the resource element of the PTRS is zero is
Terminal device characterized in that notified by the RRC. A base station apparatus for communicating with a terminal apparatus,
A receiver which receives a PUSCH to which a PTRS signal is mapped;
A multiple separation unit for separating the PTRS signal from the PUSCH,
The multiple separation unit is based on at least the offset of the frequency position, the C-RNTI, the number of scheduled resource blocks, and the frequency density of the PTRS.
And separating the PTRS signal mapped to a subcarrier. A communication method of a terminal apparatus communicating with a base station apparatus,
The PTRS signal generated by the pseudo random code is mapped to the subcarrier based at least on the offset of the frequency position, the C-RNTI, the number of scheduled resource blocks, and the frequency density of the PTRS,
And transmitting the PUSCH to which the PTRS signal is mapped. A communication method of a base station apparatus for communicating with a terminal apparatus,
Receives a PUSCH to which a PTRS signal is mapped,
From the PUSCH, based at least on an offset of a frequency position, a C-RNTI, the number of scheduled resource blocks, and a frequency density of a PTRS,
And separating the PTRS signal mapped to a subcarrier. An integrated circuit mounted in a terminal device that communicates with the base station device,
Multiple means for mapping a PTRS signal generated by a pseudo random code to a resource element,
A transmitting means for transmitting the PUSCH,
The multiple means maps the PTRS signal to a subcarrier based at least on the offset of the frequency position, the C-RNTI, the number of scheduled resource blocks, and the frequency density of the PTRS,
And the transmitting means transmits the PUSCH to which the PTRS is mapped. An integrated circuit mounted in a base station apparatus for communicating with a terminal apparatus,
Receiving means for receiving a PUSCH to which a PTRS signal is mapped;
And multiple separating means for separating the PTRS signal from the PUSCH,
The multiple separation means is based, at least on the basis of the offset of the frequency position, the C-RNTI, the number of scheduled resource blocks, the frequency density of the PTRS,
And separating the PTRS signal mapped to a subcarrier.

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